344 
BULLETIN OF THE BUREAU OF FISHERIES 
One specimen was collected of a species of Polydora, probably Andrews’ Polydora 
commensalis, since, although mutilated, it showed one of the distinguishing character- 
istics of that species. Furthermore, it was found in a region of shells, mud, and sand 
where this species might occur. The specimen was collected well up in the bay at 
area R' off the mouth of the Patuxent River. (Depth 7 meters, salinity 12.64 per 
mille, temperature of water 23.9° C., August, 1920, cruise.) 
Treadwell describes a new species, Prinospio plumosa. A number of specimens 
of this annelid were dredged during the August and October, 1920, cruises (depths 
from 8 to 48 meters) at areas R, R', L', M, N', H', and J. It will be seen that speci- 
mens were taken from the middle third of the bay — that is, from the mouth of the 
Patuxent River to the mouth of the Rappahannock River in waters where the salini- 
ties and temperatures ranged from 15.39 to 25.21 per mille and 19.2° C. to 24.8° C. 
Glycera americana, which has been reported in various places from South Carolina 
to Cape Cod, was caught on one occasion only in Chesapeake Bay. Two specimens 
were taken at area B in the lower bay during the August, 1920, cruise. (Depth 12.8 
meters, salinity 24.34 per mille, and temperature 25° C.) Another species of Glycera, 
G. dibranchiata, was more widely distributed, judging from our collections. It was 
found in the mouth of the bay and as far north as the mouth of the Patuxent River 
at depths of 16 to 46 meters. The salinities and temperatures ranged from 16.60 to 
31.74 per mille and 10.2° C. to 17.3° C. 
Goniada oculata described by Treadwell from material collected on the coast of 
Porto Rico was taken quite frequently in Chesapeake Bay during the cruises of 
August, October, December, 1920, and March- April, 1921. It was found at depths 
from 11 to 46 meters where the salinity and temperature of the water ranged from 
15.00 to 23.87 per mille and 10.1° C. to 24.8° C. One specimen (the above data do 
not refer to it) was taken on the 40-fathom line just outside of the bay and the rest 
from areas distributed from James Island to the mouth; that is, the lower two-thirds 
of the bay. 
Another widely distributed annelid in Chesapeake Bay is Pectinaria gouldii — an 
annelid that lives in a tube of conical shape. It was brought up from areas Z, S, N', 
J, I, Q, and D, which are fairly well distributed from the mouth of the Magothy 
River to the region of Cape Charles City, not far from the mouth of the bay. It was 
taken at depths from 8 to 44 meters where the salinities and temperatures of the water 
were from 8.89 to 21.83 per mille and 7.5° C. to 24.8° C. The specimens were col- 
lected during the July, August, October, December, 1920, and the March-April, 
1921, cruises. 
Maldane elongata, which makes tubes of mud and which has been reported from 
muddy and sandy regions along our coast, was found in the mouth of the bay (area 
G) where the bottom was black mud and sand. It was brought up from a depth of 23 
meters. The salinity and temperature of the water were 30.96 per mille and 11.6° C. 
Praiiothea torquata, was taken on several occasions in Chesapeake Bay, but all of 
the specimens collected were found in the mouth of the bay and the adjacent regions. 
They were collected from depths of 11 to 42 meters where the salinities and tem- 
peratures of the water ranged from 23.87 to 30.96 per mille and 10.9° C. to 25.0° C. 
Three species, Eupomatus dianthus, Terebella ornata, and Loimia turgida, were 
collected in very small numbers and only from the lower part of the bay. The first 
is one of the serpulids which is known to be very common from Florida to Cape Cod. 
It was found on a rocky bottom at 13 meters. (Salinity 18.47 per mille and temper- 
